They normally consider majority of Africans and their life style
Forexample, in Tanzania only 20% of population stays in those beautiful Cities, same to Kenya...and there are Westerners, Indians and Chinese there as well while 80% are peasants lives in rural areas
Majority of Africans are poor especcially in 3rd world countries where people survives under 1$, failing to sustain their life
So, very few Africans lives a wealthy life and most of them are not Blacks, majority lives in hardship environments without safe water, good education, good Shelter etc.